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Quaternion.Exp(Quaternion) Method (Microsoft.DirectX)

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Calculates the exponential.

Definition

Visual Basic Public Shared Function Exp( _
    ByVal q As Quaternion _
) As Quaternion
C# public static Quaternion Exp(
    Quaternion q
);
C++ public:
static Quaternion Exp(
    Quaternion q
);
JScript public static function Exp(
    q : Quaternion
) : Quaternion;

Parameters

q Microsoft.DirectX.Quaternion
Source Quaternion structure.

Return Value

Microsoft.DirectX.Quaternion
The Quaternion structure that is the exponential of the q parameter.

Remarks

The Exp method converts a pure quaternion to a unit quaternion. The method expects a pure quaternion, where w is ignored in the calculation (w == 0). In the following example, v represents the vector portion of a quaternion.

Given a pure quaternion defined by:
q = (0, theta * v); 

This method calculates the exponential result.
exp(Q) = (cos(theta), sin(theta) * v)

The SquadSetup method also can be used to set up the control points of a quaternion.